User's Manual

545C Operations Manual

02/10/2012 Prerelease DCN 00001789-A

To make the marker-drop mechanism function, the CTS signal must be

enabled so that it can be detected at DTR should the switch close. A good

time to enable CTS – set CTS to high – may be when the MCC-545C is

powered up. The command EVENT,RESET,SET,CTS will do this. The event

is RESET. The action is SET,CTS. The “ignition” bit should also be set in

the status word, the command EVENT,RESET,SET,BIT2 will set the ignition

bit. The bits of the status register are numbered from low order to high

order, BIT0 through BIT15. The MARK bit is the same as BIT3, and the

action MARK is used instead of SET,BIT3 for clarity.

The command EVENT,DIOHI,DTR,16,160,MARK defines an event that

creates a vehicle collision report if the DTR signal is high for 1 second (16

sixteenths of a second). The event will clear and be ready for another

event if the signal is low for 10 seconds (160 sixteenths of a second). DIOHI

means “discrete I/O high” and DTR specifies the DTR discrete input. The

parameters DIOHI,DTR,16,160 define the event. The parameter “MARK”

defines the action.

The User will create the event table with the following commands:

5.6.5 Event Programming Command Summary

There can be from 1 to 400 events defined in the event table including

reset and scanned events. The following list shows all the command

formats. Commands tagged “Yes” in the “Event” column each consume one

entry in the event table. Some of the commands, tagged with “No”, are

used to free up event table entries or control the operation of the event

monitor.

There is also a group table, and a text table. The group table is an array of

16 groups by 16 sensors. Each entry in the group table consists of a sensor

type – discrete or analog – and a discrete bit identification or analog

channel number. Commands tagged “Yes” in the “Group” column each

EVENT,STOP

EVENT,DEL,ALL

EVENT,RESET,SET,CTS

EVENT,RESET,SET,BIT2

EVENT,DIOHI,DTR,16,160,MARK

EVENT,START

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